采用应变电极技术研究了应变幅、应变速率与外加电位对形变中金属电化学腐蚀过程的影响。选用的体系为工业纯Ｆｅ－３．５％ＮａＣｌ水溶液和Ａ５３７钢－３．５％ＮａＣｌ＋１％ＮａＮＯ２水溶液结果表明，塑性变形对阳极过程的加速作用大于对阴极过程的加速作用，这种作用主要发生在自腐蚀电位附近。在强阳极与强阴极极化区，由于强的分反应驱动力，单个反应的电流增大，导致了形变电流的增加相对不重要。活化体系的金属溶解电流主要受应变幅控制，而钝化体系则主要由应变速率控制，取决于应变活化区域的再钝化动力学过程．
Straining electrode technique has been utilized to study the effects of strain amplitude, strain rate and applied potential on electrochemical corrosion process of defoming metals. The chosen systems were Fe/3.5% NaCl and A537/3.5% NaCl＋1%NaNO2 aqueous solutions. The experimental results showed that, the accelerating effect of plastic straining on the anodic dissolution was greater than that on the cathodic reaction. and this accelerating effect was mainly found near the free corrosion potential. In the strongly anodic and cathodic polarized region, the deforming effect on electrode reactions was not important because of the great reacting driving force. The strain current depended on the strain amplitude for active system and on the strain rate for the passive system, respectively. The change of deforming current was determined by the kinetic process of repassiviting of active area on the electrode surface.
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| [1] | |
| [2] | |
| [3] | |
| [4] | HoarTP,WestJM,ProcRoySoc,A1962 |
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